five-dollar

The compound adjective 'five-dollar' is a transparent combination of the cardinal number and the name of the currency unit. 'Five' originates from the Proto-Indo-European root penkwe, which gave rise to the number across many Indo-European languages, including the Germanic branch that led to Old English 'fīf'. 'Dollar' has a more specific and modern origin, tracing back to a 16th-century silver coin minted in a Bohemian valley. The compound itself follows a common English pattern for denoting price or value, where a number is directly attached to the monetary unit to create a pre-nominal modifier, literally meaning "of or pertaining to five dollars."

Structure: five (number) + dollar (monetary unit) - five: From Old English 'fīf', of Germanic origin; related to Dutch 'vijf' and German 'fünf', from an Indo-European root shared by Latin 'quinque' and Greek 'pente'. Functions as a numerical quantifier. - dollar: From early Flemish or Low German 'daler', short for 'Joachimsthaler', a coin from the silver mines of Joachimsthal (now Jáchymov in the Czech Republic). The term entered English via Dutch. Functions as the noun denoting the specific unit of currency.